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/**
* Handles the import requests
*/
/*
* 2011 Peter 'Pita' Martischka (Primary Technology Ltd)
* 2012 Iván Eixarch
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS-IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var ERR = require("async-stacktrace")
, padManager = require("../db/PadManager")
, padMessageHandler = require("./PadMessageHandler")
, async = require("async")
, fs = require("fs")
, path = require("path")
, settings = require('../utils/Settings')
, formidable = require('formidable')
, os = require("os")
, importHtml = require("../utils/ImportHtml");
//load abiword only if its enabled
if(settings.abiword != null)
var abiword = require("../utils/Abiword");
//for node 0.6 compatibily, os.tmpDir() only works from 0.8
var tmpDirectory = process.env.TEMP || process.env.TMPDIR || process.env.TMP || '/tmp';
/**
* do a requested import
*/
exports.doImport = function(req, res, padId)
{
//pipe to a file
//convert file to html via abiword
//set html in the pad
var srcFile, destFile
, pad
, text;
async.series([
//save the uploaded file to /tmp
function(callback) {
var form = new formidable.IncomingForm();
form.keepExtensions = true;
form.uploadDir = tmpDirectory;
form.parse(req, function(err, fields, files) {
//the upload failed, stop at this point
if(err || files.file === undefined) {
if(err) console.warn("Uploading Error: " + err.stack);
callback("uploadFailed");
}
//everything ok, continue
else {
//save the path of the uploaded file
srcFile = files.file.path;
callback();
}
});
},
//ensure this is a file ending we know, else we change the file ending to .txt
//this allows us to accept source code files like .c or .java
function(callback) {
var fileEnding = path.extname(srcFile).toLowerCase()
, knownFileEndings = [".txt", ".doc", ".docx", ".pdf", ".odt", ".html", ".htm"]
, fileEndingKnown = (knownFileEndings.indexOf(fileEnding) > -1);
//if the file ending is known, continue as normal
if(fileEndingKnown) {
callback();
}
//we need to rename this file with a .txt ending
else {
var oldSrcFile = srcFile;
srcFile = path.join(path.dirname(srcFile),path.basename(srcFile, fileEnding)+".txt");
fs.rename(oldSrcFile, srcFile, callback);
}
},
//convert file to html
function(callback) {
var randNum = Math.floor(Math.random()*0xFFFFFFFF);
destFile = path.join(tmpDirectory, "eplite_import_" + randNum + ".htm");
if (abiword) {
abiword.convertFile(srcFile, destFile, "htm", function(err) {
//catch convert errors
if(err) {
console.warn("Converting Error:", err);
return callback("convertFailed");
} else {
callback();
}
});
} else {
// if no abiword only rename
fs.rename(srcFile, destFile, callback);
}
},
function(callback) {
if (!abiword) {
// Read the file with no encoding for raw buffer access.
fs.readFile(destFile, function(err, buf) {
if (err) throw err;
var isAscii = true;
// Check if there are only ascii chars in the uploaded file
for (var i=0, len=buf.length; i<len; i++) {
if (buf[i] > 240) {
isAscii=false;
break;
}
}
if (isAscii) {
callback();
} else {
callback("uploadFailed");
}
});
} else {
callback();
}
},
//get the pad object
function(callback) {
padManager.getPad(padId, function(err, _pad){
if(ERR(err, callback)) return;
pad = _pad;
callback();
});
},
//read the text
function(callback) {
fs.readFile(destFile, "utf8", function(err, _text){
if(ERR(err, callback)) return;
text = _text;
// Title needs to be stripped out else it appends it to the pad..
text = text.replace("<title>", "<!-- <title>");
text = text.replace("</title>-->");
//node on windows has a delay on releasing of the file lock.
//We add a 100ms delay to work around this
if(os.type().indexOf("Windows") > -1){
setTimeout(function() {callback();}, 100);
} else {
callback();
}
});
},
//change text of the pad and broadcast the changeset
function(callback) {
var fileEnding = path.extname(srcFile).toLowerCase();
if (abiword || fileEnding == ".htm" || fileEnding == ".html") {
importHtml.setPadHTML(pad, text);
} else {
pad.setText(text);
}
padMessageHandler.updatePadClients(pad, callback);
},
//clean up temporary files
function(callback) {
//for node < 0.7 compatible
var fileExists = fs.exists || path.exists;
async.parallel([
function(callback){
fileExists (srcFile, function(exist) { (exist)? fs.unlink(srcFile, callback): callback(); });
},
function(callback){
fileExists (destFile, function(exist) { (exist)? fs.unlink(destFile, callback): callback(); });
}
], callback);
}
], function(err) {
var status = "ok";
//check for known errors and replace the status
if(err == "uploadFailed" || err == "convertFailed")
{
status = err;
err = null;
}
ERR(err);
//close the connection
res.send("<head><script type='text/javascript' src='../../static/js/jquery.js'></script><script type='text/javascript' src='../../static/js/jquery_browser.js'></script></head><script>$(window).load(function(){if ( (!$.browser.msie) && (!($.browser.mozilla && $.browser.version.indexOf(\"1.8.\") == 0)) ){document.domain = document.domain;}var impexp = window.parent.padimpexp.handleFrameCall('" + status + "');})</script>", 200);
});
}
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